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Summary Graad 8 Natuurwetenskappe (NW) Opsommings - Kwartaal 4 (Doc Scienta)

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Die opsommings is saamgestel deur die Doc Scientia handboek se Kwartaal 4 werk op te som. Eenheid 1:  Die sonnestelsel Eenheid 2:  Anderkant die sonnestelsel Eenheid 3:  Verkenning van die ruimte

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, 1.1 Die son
• Die son is die naaste ster aan die Aarde en
1.3 Die aarde se posisie in die heelal die grootste voorwerp in die sonnestelsel.
• Die Aarde is die enigste bekende planeet wat lewe • Dit is ’n bol van brandende gasse wat lig en
kan ondersteun weens sy spesifieke toestande. hitte verskaf deur kernfusie, waar
• Belangrike Lewe-onderhoudende Faktore: waterstofgas na helium omgeskakel word.
o Temperatuur: ’n Ideale gemiddelde van 14°C as • Die oppervlak het “koeler” donker kolle
gevolg van sy afstand van die son. Eenheid 1: genaamd sonvlekke, terwyl die
o Water: Kom in drie toestande voor (vas, kerntemperatuur ongeveer 15,6 miljoen K
vloeibaar, gasvormig) en bedek 70% van die Die bereik.


Sampleoppervlak.
o Sonlig en Suurstof: Sonlig maak fotosintese
moontlik, wat die suurstof produseer wat vir
asemhaling nodig is.
o Atmosfeer: Bevat stikstof vir plantgroei,
sonnestelsel




Summaries after sample
koolstofdioksied vir fotosintese, en ’n osoonlaag
wat teen UV-strale beskerm. 1.2 Voorwerpe rondom die son
• Planete: Daar is agt planete wat lig weerkaats, genoeg massa het om
rond te wees, en hul eie wentelbane van ander puin skoonmaak.
• Dwergplanete: Voorwerpe soos Pluto, Eris en Ceres wat om die son
wentel, maar te klein is om hul wentelbane skoon te maak.
• Mane: Natuurlike satelliete wat om planete wentel; byvoorbeeld, die
Aarde het een maan terwyl Jupiter 63 het.
• Klein Liggame:
o Asteroïdes: Onreëlmatige, metaalagtige rotse wat meestal in die
asteroïdegordel voorkom.
o Meteoriete: Stukkies rots wat die Aarde se oppervlak tref nadat dit
as meteore deur die atmosfeer beweeg het.
o Komete: Massas ys en stof met indrukwekkende sterte, afkomstig uit
die Kuiper-gordel of Oort-wolk.



GR8 NW K4 Breinkaart Doc Scientia Kopiereg © www.summariessa.co.za (DO NOT COPY)

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